ACCESSING OUTLOOKX ON MAIN FROM CLIENT

I HAVE SET UP A PEER TO PEER NETWORK THRU A HUB ON 2 NEW COMPUTERS, BOTH WITH WINDOWS XP. I SET UP THE CONNECTION TO OUR DIAL UP INTERNET SERVICE ON THE MAIN COMPUTER USING THE XP WIZARD, AND CAN ACCESS THE INTERNET ON THE CLIENT COMPUTER THUR THE MAIN. I AM ABLE TO SHARE FILES AND FOLDERS. WHAT I CAN NOT FIGURE OUT HOW TO DO IS ACCESSING ONLY THE OUTLOOK EXPRESS ON THE MAIN COMPUTER FROM THE CLIENT SO I CAN MANAGE MY EMAIL FROM BOTH, IF THIS IS POSSIBLE.